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108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
#ifndef COMPILER_EXPRPARSER_H_INCLUDED
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#define COMPILER_EXPRPARSER_H_INCLUDED
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#include <vector>
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#include <components/interpreter/types.hpp>
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#include "parser.hpp"
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#include "tokenloc.hpp"
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namespace Compiler
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{
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class Locals;
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class Literals;
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class ExprParser : public Parser
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{
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Locals& mLocals;
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Literals& mLiterals;
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std::vector<char> mOperands;
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std::vector<char> mOperators;
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bool mNextOperand;
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TokenLoc mTokenLoc;
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std::vector<Interpreter::Type_Code> mCode;
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bool mFirst;
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bool mArgument;
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std::string mExplicit;
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bool mRefOp;
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bool mMemberOp;
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int getPriority (char op) const;
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char getOperandType (int Index = 0) const;
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char getOperator() const;
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bool isOpen() const;
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void popOperator();
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void popOperand();
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void replaceBinaryOperands();
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void pop();
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void pushIntegerLiteral (int value);
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void pushFloatLiteral (float value);
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void pushBinaryOperator (char c);
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void close();
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int parseArguments (const std::string& arguments, Scanner& scanner);
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bool handleMemberAccess (const std::string& name);
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public:
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ExprParser (ErrorHandler& errorHandler, const Context& context, Locals& locals,
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Literals& literals, bool argument = false);
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///< constructor
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/// \param argument Parser is used to parse function- or instruction-
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/// arguments (this influences the precedence rules).
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char getType() const;
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///< Return type of parsed expression ('l' integer, 'f' float)
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virtual bool parseInt (int value, const TokenLoc& loc, Scanner& scanner);
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///< Handle an int token.
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/// \return fetch another token?
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virtual bool parseFloat (float value, const TokenLoc& loc, Scanner& scanner);
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///< Handle a float token.
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/// \return fetch another token?
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virtual bool parseName (const std::string& name, const TokenLoc& loc,
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Scanner& scanner);
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///< Handle a name token.
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/// \return fetch another token?
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virtual bool parseKeyword (int keyword, const TokenLoc& loc, Scanner& scanner);
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///< Handle a keyword token.
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/// \return fetch another token?
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virtual bool parseSpecial (int code, const TokenLoc& loc, Scanner& scanner);
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///< Handle a special character token.
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/// \return fetch another token?
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void reset();
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///< Reset parser to clean state.
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char append (std::vector<Interpreter::Type_Code>& code);
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///< Generate code for parsed expression.
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/// \return Type ('l': integer, 'f': float)
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int parseArguments (const std::string& arguments, Scanner& scanner,
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std::vector<Interpreter::Type_Code>& code);
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///< Parse sequence of arguments specified by \a arguments.
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/// \param arguments Uses ScriptArgs typedef
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/// \see Compiler::ScriptArgs
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/// \param invert Store arguments in reverted order.
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/// \return number of optional arguments
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};
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}
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#endif
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